Kabul, Afghanistan (CNN) -- Three suicide car bombs were used to target a joint U.S.-Afghan base in eastern Afghanistan early Sunday in an attack that left at least three Afghan soldiers and two civilians dead, officials said.

The attack, described as "complex," began shortly before sunrise when insurgents attacked three different points at Forward Operating Base Fenty, near the Jalalabad Airfield, according to the NATO-led International Assistance Security Forces' regional command in Nangarhar province.

It's the latest in a series of attacks in recent years that has targeted the base, and it comes just months after NATO troops turned over security responsibilities for Nangarhar province to Afghan forces.

There were conflicting reports over casualties. ISAF said the attack left at least one Afghan solider dead and several wounded.